/* 
   NANDIKESH CONSTRUCTIONS - Responsive System
   Media Queries & Mobile Optimizations
*/

/* ----------------------------------------------------
   1. LAPTOP & MEDIUM SCREENS (Under 1100px)
------------------------------------------------------- */
@media (max-width: 1100px) {
    :root {
        --section-padding: 80px 0;
    }

    .hero-title {
        font-size: 3.25rem;
    }

    .why-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 20px;
    }

    .services-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 20px;
    }

    .projects-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }

    .safety-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }

    .footer-grid {
        grid-template-columns: 1.2fr 0.8fr 0.8fr 1.2fr;
        gap: 30px;
    }
}

/* ----------------------------------------------------
   2. TABLET PORTRAIT & LANDSCAPE (Under 900px)
------------------------------------------------------- */
@media (max-width: 900px) {
    /* Header & Mobile Drawer Navigation */
    .mobile-nav-toggle {
        display: block;
        z-index: 1100;
    }

    /* Transform primary navigation to full screen / drawer slide-in */
    .primary-navigation {
        position: fixed;
        top: 0;
        right: -100%;
        width: 320px;
        height: 100vh;
        background-color: var(--dark-bg);
        box-shadow: -5px 0 30px rgba(0, 0, 0, 0.25);
        flex-direction: column;
        justify-content: flex-start;
        align-items: flex-start;
        padding: 120px 40px 40px;
        gap: 45px;
        transition: right 0.5s cubic-bezier(0.16, 1, 0.3, 1);
        z-index: 1000;
    }

    .primary-navigation.open {
        right: 0;
    }

    .nav-menu {
        flex-direction: column;
        gap: 25px;
        width: 100%;
    }

    .nav-link {
        color: var(--white) !important;
        font-size: 1.05rem;
        display: block;
        width: 100%;
    }

    .nav-link::after {
        display: none; /* Disable desktop hover underline in mobile */
    }

    .header-cta {
        width: 100%;
        margin-top: 10px;
    }

    .btn-call {
        width: 100%;
        padding: 14px;
        font-size: 0.85rem;
        border-color: var(--white) !important;
        color: var(--white) !important;
    }

    /* Hamburger Active Animation */
    .mobile-nav-toggle.active .hamburger-bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }
    .mobile-nav-toggle.active .hamburger-bar:nth-child(2) {
        opacity: 0;
    }
    .mobile-nav-toggle.active .hamburger-bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

    /* Sections */
    .hero-title {
        font-size: 2.75rem;
    }

    .hero-description {
        font-size: 1.05rem;
    }

    .about-intro-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .about-stats-column {
        justify-content: center;
    }

    .stats-card {
        width: 100%;
    }

    .strategic-pillars-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .why-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .quality-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .quality-image {
        height: 380px;
    }

    .quality-img-column {
        order: 2; /* Move image below text for organic stacking */
    }

    .contact-grid {
        grid-template-columns: 1fr;
        gap: 50px;
    }

    .footer-grid {
        grid-template-columns: 1.5fr 1fr;
        gap: 40px;
    }
}

/* ----------------------------------------------------
   3. MOBILE DEVICES (Under 600px)
------------------------------------------------------- */
@media (max-width: 600px) {
    :root {
        --section-padding: 60px 0;
    }

    .section-header h2 {
        font-size: 1.75rem;
    }

    /* Hero */
    .hero-subtitle {
        font-size: 0.8rem;
        letter-spacing: 2px;
    }

    .hero-title {
        font-size: 2.15rem;
        letter-spacing: -1px;
    }

    .hero-description {
        font-size: 0.95rem;
        margin-bottom: 30px;
    }

    .hero-actions {
        flex-direction: column;
        gap: 15px;
    }

    .btn {
        padding: 14px 28px;
        font-size: 0.8rem;
    }

    /* Stats Card Mobile Reflow */
    .stats-card {
        grid-template-columns: 1fr;
        gap: 30px;
        padding: 30px;
    }

    .stat-number {
        font-size: 2.75rem;
    }

    /* Pillar adjustments */
    .pillar-card {
        padding: 35px 25px;
    }

    /* Why & Services stack to single column */
    .why-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .services-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .projects-grid {
        grid-template-columns: 1fr;
    }

    .project-filters {
        flex-wrap: wrap;
        gap: 8px;
    }

    .filter-btn {
        padding: 10px 18px;
        font-size: 0.75rem;
        flex: 1 1 calc(50% - 8px); /* Take half screen size for neat mobile grids */
        text-align: center;
    }

    /* Safety & QA */
    .safety-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .safety-card {
        padding: 30px 20px;
    }

    /* CTA Section */
    .cta-content h2 {
        font-size: 1.85rem;
    }

    .cta-content p {
        font-size: 0.95rem;
    }

    /* Contact Details Column */
    .contact-info-list {
        gap: 20px;
    }

    .rfp-form {
        padding: 30px 20px;
    }

    .form-group-row {
        grid-template-columns: 1fr;
        gap: 0;
    }

    /* Footer */
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .footer-bottom-flex {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }
}